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المؤلفYuda, Afdhal
المؤلفKumar, Anand
المؤلفAbu Reesh, Ibrahim
المؤلفRussell, Christopher K.
المؤلفMiller, Jeffrey T.
المؤلفAli Saleh Saad, Mohammed
المؤلفAl-Marri, Mohammed J.
تاريخ الإتاحة2022-12-27T10:25:12Z
تاريخ النشر2022-01-01
اسم المنشورInternational Journal of Energy Research
المعرّفhttp://dx.doi.org/10.1002/er.8696
الاقتباسYuda, A., Kumar, A., Abu Reesh, I., Russell, C. K., Miller, J. T., Ali Saleh Saad, M., & Al‐Marri, M. J. (2022). Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique. International Journal of Energy Research.‏
الرقم المعياري الدولي للكتاب0363907X
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85141180787&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/37661
الملخصHerein, we report the synthesis of silver-based electrocatalysts (Ag/C, AgCo/C, and AgNi/C) using solution combustion method and their performance towards methanol oxidation reaction. Detailed structural and microscopic analysis confirmed the formation of graphitic carbon, synthesis of crystalline phases with high porosity in all the three electrocatalysts. X-ray photoelectron spectroscopic (XPS) analysis showed a high concentration of Ag2O (or Ag+) on AgNi/C, whereas AgCo/C exhibited a high concentration AgO (or Ag2+) on the surface. XPS analysis on C 1s confirmed the highest concentrations of the sp2 hybridized C-C bond on Ag/C, C-O on AgNi/C, and O-C-O bond on AgCo/C, respectively. The X-ray absorption spectroscopy (XAS) analysis on Ag edge showed a similarity in the bond lengths in AgCo and AgNi samples to that of bulk silver, that has a bond length of 2.89 Å, with only silver-silver scattering and the absence of a different or a nonsilver metal in the nanoparticles. This indicates that there is no Ag-M alloying. Nonetheless, a significant difference in particle sizes was observed, with 2.5 and 6 nm, respectively for AgNi and AgCo. Methanol electrooxidation experiments performed on the electrocatalysts indicated AgNi/C to show better performance in comparison to AgCo/C and Ag/C. Anodic polarization curves obtained from linear sweep voltammetry (LSV) measurements demonstrated a superior performance of AgNi/C with an onset potential of 0.41 V. In addition, 20 h chronoamperometry experiment also confirmed a sustained superior performance of AgNi/C catalyst, which could be due to smaller particle size and stabilization of Ag+ on the surface of the catalyst.
راعي المشروعThis work was made possible by the NPRP grant (NPRP13S‐0109‐200029 and NPRP8‐145‐2‐066) from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. Use of the Advanced Photon Source is supported by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences, under contract DE‐AC02‐06CH11357. Authors would also like to acknowledge Dr. Md. Abdul Matin for his initial support on catalysts synthesis and characterization. The authors would also like to acknowledge QEERI Core Labs for their support related to the TEM characterization.
اللغةen
الناشرJohn Wiley and Sons Ltd
الموضوعmethanol electrooxidation
silver based catalysts
solution combustion synthesis
العنوانElectrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique
النوعArticle
dc.accessType Open Access


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